#!usr/bin/env python  
# -*- coding:utf-8 _*-
""" 
@author:robot
@file: demo01.py 
@version:
@time: 2023/04/21 
"""
import objgraph

a = [1, 2, 3]
b = [4, 5, 6]

a.append(b)
b.append(a)

objgraph.show_refs([a])
